Furnace for the destruction of house and garden refuse



G. WATSON. FURNACE FOR THE DESTRUCTION OF HOUSE AND GARDEN REFUSE. APPLICATION FILED MAR. 10, 1920- v 1 %33 Patented 0013.24, W22.

2 SHEETS-SHEET I.

e. WATSON. FURNACE FOR THE DESTRUCTION OF'HOUSE AND GARDEN REFUSE.

, APPLICATION FILED MAR, l0. I920. 1AA o Patented Oct. I, 11922.

2 SHEETS-SHEET 2.

III.

GEORGE WATSON, OF LONDON, ENGLAND.

FURNACE FOR THE DESTRUCTION 0]? HOUSE AND GARFEN REFUSE.

Application filed March 10, 1920. Serial No. 364,611.

To all whom it may concern:

Be it known that ll, GEORGE WATSON, a subject of the Kin of Great Britain, residing at Walter Tlouse, lBedford Street, Strand, London. England, have invented new and useful Improvements in Furnaces for the Destruction of House and Garden Refuse, of which the following is a specification.

This invention relates to the construction of comparatively small furnaces, especially adapted for working under natural draught conditions and suitable for burning the refuse of gardens and houses.

The furnace consists of an outer casing of suitable material, such as, for instance, cast or wrought iron or steel, and it may if desired be lined with firebricks.

According to this invention in order to provide a rigid structure the furnace is formed triangular in cross section and preferably tapers so that the, capacity of the furnace is larger at the bottom than at the top in order to facilitate the falling of the material within the furnace. The furnace space is enclosed by three plates which are secured to ether by angle pieces of suitable materia such as, for instance, cast iron, and preferably extend along the whole length of the joint from top to bottom. Two sets of girdles or ties pass through the angle pieces and are secured to them by screw nuts by means of which the furnace is held together.

Asbestos or slag wool packing or cement or mortar of any kind may be used bet-ween the angle pieces and the edges of the plates to make the joints tight. The top casting. which is provided with a lid and a lever for opening the same, is of ordinary construct1on. A chimney may lead from. one corner of the furnace and a hanging bridge is provided near to the chimney opening in. side the furnace for the purpose of causing the smell and smoke from any refuse newly charged to pass downward through or over the hottest part of the fire thus minimizing the smoke and smell esca ing from the chimney. lltalso causes com ustion to s read throughout the whole mass of refuse. he hanging bridge may be formed either of cast iron or of firebrick with a bar or bolt passing through it, and may be hung from the top casting by passing the bolt through the same and supporting it either by means of a nut or a cotter. The chimney may be carried through the top forming a hanging bridge.

Three draught openings are provided at the bottom 0 the furnace, one in each of the three sides, and plain plate doors are provlded for wholly or partially closing the same, so that the draught ma be easily regulated, taking advanta.;e of the direction of the wind.

are furnace may be used either with or without a grate. When used without a grate the plates stand either on the earth or on a concrete or other smooth platform u on which the material to be destroyed lies w ile 1t is being burned. In cases, however, where a grate is used, it is constructed of one castlng with three legs and is placed in position on the ground, the furnace being erected over it. To facilitate the raking both above and below the grate, the grate is made of such a. height as to leave about half the rake door 0 ening above it and half below it.

A p ain hearth of brick concrete or earth is preferably used for the production of a manurial ash from the refuse, whereas the use of a grate is preferably when it is desued to produce a hard clinker instead of an ash.

The accompanying drawings show furnaces made in accordance with this invention. Figure 1 is an elevation, Figure 2 a section, Figure .3 a plan of one form of furnace; Figure 4 is a section and Figure 5 a plan of a grate suitable for use therein; Figure 6 is a section and Figure 7 a plan of a modified form; and Figures 8 and 9 are similar views of another modification.

The furnace is formed of three plates a secured together by angle pieces 19, whilst two sets of ties c and a? are secured to them -by nuts 0 and d by which the furnace is held together- A chimney e of triangular section leads from one corner and below the chimney is a hanging bridge f which is hung from the top by a bolt 7. Three draught openings 9 are provided at the bottom of the sides, each having a door 72. by which it can be wholly or partially closed, so that the draught may be easily regulated, advantage being taken of the direction of the wind. The grate j is mounted on three legs is. r

11 Figures 6 and 7, the furnace 1s of similar construction to that shown in the former figures, except that the hanging bridge f is made in one piece with the chimney e. The chimney e fits into the hole. provided for it and has flanges e which rest on the top of the furnace.

When the part of the chimney exposed to the greatest heat is burnt away the chimney may be turned exposing another of the sides to the greatest heat.

In the furnace shown in Figures 8 and 9, the chimney e is of the same size as the top of the furnace, and in this case the hanging bridge is necessarily dispensed with.

By constructing the furnace of a triangle form the plates employed form a rigid structure as soon as they are tightened by the tie bolts. With a square construction this is not the case as the plates would fall inwards unless snugs were placed upon them to prevent it. By using three plates I avoid the necessity of a base plate to give rigidity to the structure and the construction conveniently adapts itself to the use of a chimney wih a feed opening in front of it. As before stated the advantage of the hanging bridge or chimney projecting into the furnace is that it causes the smell or smoke from any refuse newly charged to pass downward through or over the hottest part of. the fire thus minimizing the smoke or smell escaping from the "chimney. It also causes the combustion to spread throughout the whole mass of refuse What I claim is s i 1. A furnace for'the destruction of refus in which the body of the furnace consists of three plates secured together by three through the top angle pieces at the corners and ties connecting the angle pieces and secured thereto. 2. A furnace for the destruction of refuse m which the body of the furnace consists of three plates secured together by three angle pieces at the edges and ties connecting the angle pieces and secured thereto. each of said plates being formed with a draft opening near the bottom.

3. A furnace for the destruction of refuse. of triangular cross section and of larger cross section at the bottom than at the top. and which has a chimney of triangularcross section formed in one piece with a hanging bridge.

4. A furnace for the destruction of refuse. of triangular cross section, having a chimney of triangular cross section which extends of the furnace and is provided with a hanging bridge.

5. A furnace for the destruction of refuse, of triangular cross section and of larger cross section at the bottom than at the top, having a chimney of triangular cross section which extends through the top of the furnace and is provided with a hanging bridge.

6. A furnace for the destruction of refuse, of triangular section throughout and having a chimney secured to the narrowest part 0 1 the to of the furnace which extends throug the top of the furnace and is provided with a hanging bridge.

In testimony that I claim the foregoing as my invention I have signed my name this 23d day of February, A. D. 1920.

GEORGE WATSON. 

